Should Freedom of speech not be in limits?

There should be slight limits on the freedom of speech. One reason for that is because there are those who will use that right (if it had no limits) to promote the abuse or violence against others without being responsible for it. Someone could yell out kill them all and if someone actually did it because that person said it then the one who spoke those Words would not be liable. With restrictions in the law that state that if your Words directly lead to some violent acts against someone the people are much better protected and justice can be served to both promoter of that violent act and the one who committed the act of violence.